Doorknob fastening



Patented Mar. 25, 1924.

MARTIN MODONALD, Oli WASHINGTON, DISTRICT 0F COLUMBIA.

IJOORKNOB FASTENING.

Application filed December 13, 1921.

This iilvention relates to (1001 knobs ami e more particularly to means for fastening the knob tothe spindle, and has for its objt to provide certain new and usefu] improvements in the construction shown in my prior Patent No. l,l28,339,issued February 16, 1915. The particular feature of invention set f0rth in the present case is the eonstruction Whereby the form'ation of the ratchet teeth on the interior of the kn0b sbank is simplified and rendered inexpen- In the drawings:-

Figure 1 is a longitudinal sectionai view taken through EL door knob and the adjacentend portion of a spindle having my invention applied thereto.

Figure 2 is a cross sectional view on the line 2-2 of Figure 1.

Figure 3 is a view similar to Figure 2, che pinclle end dog or detent being omitted.

Figure 4 is a perspective view of one end of the spindle. 4 I

Figure 5 is a detail perspeetive view of the double dog or detent Which is earried by the spindle. W

A S shown in the gzceompanying drawing, 1 dsignates a spindle, and 2de'signates a knob of any eommon or preferred form or coflstruction. The spindle is reetzingular in cross sect-ion, as usual, and the tubular shank 3 of the knob is provided with a reetangular bore 4, as usual, to receive one end portion of the spindle.

As in my prior patent, the -spindle 1 is provided in each end with an opening or slot 5 extending transversely therethrough.

and disposed longitudinally of the spindle for a suitable distance. Within this opening there is mounted a double dog or detent 6, one end of whieh is pivo tally mounc-ed upon ,21, pin 7 carried by the spindle and extending tr an sverselyeeross the opening 5 adjacent the innepend thereof. The dog shown in the accompanying drawing is formed from a single piece of spring metal Which is beni; intermediate of' ts'ends. into substantially U shape, and the end portion Serial No. 522,021.

of each side or 1eg of the dog is bentback upon itself to forno a ratchet finger 8, che extremity of which flares outwardly from the U-Shaped body or shank of the dog. The dog may be conveniently assembled with the spindle by placing the dog estraddle of the pin 7 and then -turning the dog into the opening 5 in longitudinal alignment therewith. The ratchet fingere 8 extend outwardly through the open sides of the slot or opening 5 end slightl beyond the slotted aces of the spindle, es 0 early indioated in Figure 1 of tbe drawing.

The knob sbank 3 is sp1it longitudinally as at 9, and also at right angles there to as at 10, thereby producing two longitudinal slots or bifurcations intersecting one another ai; substant-ially right angles, and also interseeting tbe end of the shank 3 opposite the knob 2.

Ratchet teeth 11 are formed 011 the walls of the bore 4 of the knob shan k 3, end these teeth are out by means of a, suitab=le ta introduced through the open end of che ore, and therefore it Will be understood that the ratehet teeth 11 are in the nature of a screw thread out on the eight corners of the bere 4, which corners are formed by the intersections of the slots 9 and 10 with the walls of the bore. The operation of critting tbe ratchet teeth by means of' a tap is a Very simple and inexpensive one, and at the same time the ratchet teeth are formed in a very simple and efiicient man- In assembling the parts of the deviee, a dog or deten t 6 is mounted within eaoh end of the spindle 1 and the 1atter thrust endwise through the look of the door with its ends projeoting' ai: opposite sides of the door, the door being indicated at 12 in Figure 1 of the drawing. The usual face plate or escutcheon is indieated at 13. The knob and its shank 3 are'then assembled upon one end of the spindle 1 by reeeiving the latter endwise through the open end of the bore 4, che ratchet teetb being engaged by the free end portions 8 of the dog or detent 6 over Wbich end portions the ra tchet teeth slip until the end of the knob-shank is in close proximity with the adjacent fece of the door of the eseutcheon plate 13, ai: which point the free extremities 8 of the dog snap into engage m'ent with adjaeent ratchet teeth anrl boicl the knob shank 3 snugly upon the spndle. As the spnd1e 1 and the bere ef the shank 3 are rectangular in cross seeton and fit ene. anether wth comparatiye snugness, rotatien ef the knob- Wll of course result in retation ef the spindle, but the knob is prevented from being pulled endwise frem the spndle by reason of the engagementof the dog With the ratehet teeth ef the kneb s-bank, end therefere the kneb Will be eflectually end rigdly held upen the spindle in a very simple and eflcient manner. The knob may be fitted to any desired adjusted pesitien upon the spindle, as the ends ef the dog Will coeperate wth tbe ratehet teeth at any pont along the bere of the kneb shank. The knob may be remeved frem the spndle by disengaging the free end pertiens of che deg from fihe ratehet teeth which will leave the knob shenk free frem the spindle end in which eondtion t may be readily 1noved endwse frern the spndle. The slot or bifurcaten 9 gves access to the free extremties ef the deg fer convenence in dsengaging the latter from the ratchet teeth ef the knob shank.

It Wl1 of course be understoed thai; eaeh end of the spindle is provided With a dog, and when the spindle 'has been placed in a (1001, the knebs may be Very conveniently fitted to the respective ends of the spndle and adjusted thereen in accordance With the thckness of the doer.

It will be noted tbat se far as external appearance s cencerned, there s litt1e or no change in the kneb end spindle, but at the same time the fastenng s efleetually housed and pretected Wthin the shank of the knob. The kneb may be very cenvenently fitted to the spindle end adjusted lengthwise thereen, end a1se may be conveniently removed. Loeseness of the knob is abselutely prevented by reason ef the two ratchet fingers engaging opposite sdes ef the bere 'of the shankv An impertant rnprovement ever rny prier patent fesides in the fact that each of the bifurcaions or slets 9 and 10 extend threugh or intersect the end of the shank opposte the kneb whereby the free extremtes of the (10;; or detent are always, accessble tbreuglrlone or the ether of the bfurcatiene and therefore there is no pestien in wbich tbe free ends of the doge are net acces-,

sble end capable ef being disengaged from the ratcheb teeth.

the spndle there is always e slot or bifur caton in the shank which exposes the free ends of the clegs'y for conveniencen dsengagng the samefrem the ratchet teth.

Having thus des'crbed the nventon what s claimed is:

1. The combinaton ef a spindle end a knob havng a shank, the spindle beng provided wth a longitudinal slot, a double dog meunted in the slot with its extremties prejectng et opposite sides of the spndle into engagement wit h eppeste walls of the bere of the knob shank, che knob shank beng provided with longitudinal bifurcatiens intersecting one anether et substantally right angles, and the bere of the shai1k havng ratchet teeth tappe-d theren and engaged by the free ends of the double deg. I

- 2.- Thecembinatien ef; a door spndle provided with ratebet fingers prejeetng et epposite sides thereef, and a door knob bavng a shenk previded Wth a bere recevng the spindle, the shankbeing prevded wth longtudinal bfureatons nterseetng one another at substantially rght angles, end thebere of the shenk having ratchet teeth tapped therein and engaged by the ratohet fingere,

3.- The cembnation ef a spindle prevded wth ratchet fingere et oppeste sides thereof, end a deor knob hzrvng a shank provided wth a longtudinal bere reeeiving tbe spindle, sad shank a1so being provided With longtudjnal bfureatons interseetng one anether et substantially right angles, the boreof the shank beng prevded with a sorew tbread out along the edges of the bere defined by the walls o-f the bere and the walls ef che bifurcatons, sad screw threacl eensttuting ratehet teeth in cooperative relatien with the ratehet fingere;

4. The eembination ofa deer spndle prevded With ratchet fingers projecting at oppesite sdes thereef, end a door knobhayng a rigd shnk provided wth a berereceivng the spindle; che shank being provded ;wth lengtudinal bifureatons ntersectng one anetber, and the bere of the sbank being provided With ratehet teet-h engaged by the ratehet fingers, erre of the bfureations beng in algnment with the ratchet fingers te gve aecess thereto fer disengaging them frena the ratchet teeth. y V

5. The cornbnation-of a substantally ree tangular deer spndle provided With ratehet fingere prejecting et oppesite sdes tbereef, end a (1001 knob having a rigid shank provided Wifh a substantally rectangular bere ience in disengaging the fingers frem the ratchet teeth.

6. The combination of a door spinde provded with a ratchet finger, a deer kneb baving a rigid shank previded with a bere receving the spindle, said bere having ratchet teeth engaged by the ratchet finger, and said shank beng provided wth e longitudine] slot interseeting the end ef the shank epposite the knob and extending throughout the teethed pertien ef the bere.

7. The cembinaten ef a door spindle prevded With a ratehet finger, a doer kneb havng a lgid shank provided with a bere receiving the spindle, said bere having ratehet teeth tappeti therein end engaged by the ratchet finger, and sad shank being previded with a lengtudnal slot intersect-ing the end 01" the shank eppesite the kneb end extending threugheut the toethed portien of the bere.

8. The combinaton ef a. (1001 spndle provded With a ratchet finger, a deer knob havin'g a rigid shank provided with a bere re ceiving the spndle, sad bere havng ratchet teeth tapped therein end engaged by the ra.tchet finger and said shank being provded with longitudnal slots ntersectng the end of the shank eppeste the kneb end extending throughout the toothed perten of the bere.

9. As a new artcle ef manufacture, a doer knob havng a rigid shank prevded wth a bere te receve a spindle, said bere having ratchet teeth tapped therein, and the said shank being provided with a lengitudinal slot intersect-ng the end of the shank eppe site the kneb and extending threugheut the toethed pertien ef the bere.

10. As a new article of manufacture a (1001 kneb heving a shank previded with a bere for receiving a spindle, said shank being provded wth lengtudinal bifurcations intersecting one another ab substantially righi; angles, the bere of the shank having ratchet teeth tappeti therein.

MARTIN MCDONALD. 

